A 100-MHZ CMOS WIDE-BAND IF AMPLIFIER

When the data rates of communication systems increase, wideband IF amp lifiers are needed, It is also possible to use a single wideband inter mediate frequency (IF) amplifier for a radio band with several narrow- band channels of varying strengths, The linearity is then critical, if intermodulation products are not to disturb weak channels, We try to find a topology for this new amplifier application, suitable for integ ration in a standard CMOS process, To get low distortion, we use an ou tput stage with high linearity, which is further linearized by feedbac k in a double-nested Miller configuration, A 0.8-mu m standard CMOS IF amplifier design with low distortion up to 20 MHz is presented.